Outer margin of antennal scale naked. Male pleopods without modified setae. Pseudobranchiae of male 2nd to 4th pleopods C-shaped, not spirally coiled. Lateral margin of telson with 4 strong spines in basal part.
Ref.: O. S. Tattersall (1952).
Kingdom Animalia Phylum Crustacea Superorder Peracarida Order Mysidacea Suborder Mysida Family Petalophthalmidae Genus Siriella Species Siriella dayi